I had one when I was 16 - after my first pap smear.

I had to have a punch biopsy done as well which I found very unpleasent - no anaesthetic! I was 16 though and I'm guessing my pain threshold would be higher now. It was just like a long pap and my legs were in stirrups too. I think because I was so young I was quite traumatised from it - to remember it still makes me shudder.